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Alloy-oxide equilibria in the system Pt-Rh-O

Jacob, KT and Priya, Shashank and Waseda, Yoshio (1998) Alloy-oxide equilibria in the system Pt-Rh-O. In: Bulletin of Materials Science, 21 (1). pp. 99-103.

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Abstract

The composition of Pt-Rh alloys that co-exist with $Rh_2O_3$ in air have been identified by experiment at 1273 K. The isothermal sections of the phase diagram for the ternary system Pt-Rh-O at 973 K and 1273 K have been computed based on experimentally determined phase relations and recent thermodynamic measurements on $Pt_{1-x}Rh_x$ alloys and Rh2O3. The composition dependence of the oxygen partial pressure for the oxidation of $Pt_{1-x}Rh_x$ alloys at different temperatures, and temperature for the oxidation of the alloys in air are computed. The diagrams provide quantitative information for optimization of the composition of $Pt_{1-x}Rh_x$ alloys for high temperature application in oxidizing atmospheres.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Indian Academy of Sciences.
Keywords: system Pt-Rh-O;phase diagram;thermodynamic properties;Pt-Rh alloys;oxidation;stability field
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 08 Feb 2005
Last Modified: 19 Sep 2010 04:15
URI: http://eprints.iisc.ernet.in/id/eprint/1479

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